"Until today, Jaxon was not able to suck on a pacifier after many months of working on it with him," the post reads. "We tried again and watched Jax teach himself how to hold on to it for several minutes at a time. This is very encouraging for the possibility of one day kicking the feeding tube completely."

They added: "We were so excited for Jaxon that we forgot the game was on for a little while! #JaxonStrong #Milestones."

Jaxon, who is missing part of his skull and brain, made headlines across the world after he defied doctors' expectations and celebrated his first birthday in August. Doctors had only given him a short time to live after he was born with a rare case of microhydranencephaly, a development abnormality that affects the brain.

After Jaxon's first birthday, his dad Brandon wrote that it's a miracle that his son is still here, as strong as ever, and only dependent on the feeding tube.

"Jaxon is still here with us, still learning, still developing, still thriving," he wrote. "He’s back to smiling at us, always so happy in the morning after he wakes up and takes turns looking at both Mommy’s and Daddy’s face, seemingly as if he is so excited to start another day."